Luminous signal device



FIG. 1 is a rear perspective view of a luminous signal device showing mynew design;

FIG. 2 is a side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is an enlarged rear view thereof; and,

FIG. 5 is an exploded front perspective view, thereof.

The ornamental design for a luminous signal device, as shown anddescribed.